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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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102 Object* receiver, | 102 Object* receiver, |
103 JSObject* holder, | 103 JSObject* holder, |
104 uint32_t key, | 104 uint32_t key, |
105 FixedArrayBase* backing_store = NULL) = 0; | 105 FixedArrayBase* backing_store = NULL) = 0; |
106 | 106 |
107 // Modifies the length data property as specified for JSArrays and resizes the | 107 // Modifies the length data property as specified for JSArrays and resizes the |
108 // underlying backing store accordingly. The method honors the semantics of | 108 // underlying backing store accordingly. The method honors the semantics of |
109 // changing array sizes as defined in EcmaScript 5.1 15.4.5.2, i.e. array that | 109 // changing array sizes as defined in EcmaScript 5.1 15.4.5.2, i.e. array that |
110 // have non-deletable elements can only be shrunk to the size of highest | 110 // have non-deletable elements can only be shrunk to the size of highest |
111 // element that is non-deletable. | 111 // element that is non-deletable. |
| 112 MUST_USE_RESULT virtual Handle<Object> SetLength( |
| 113 Handle<JSArray> holder, |
| 114 Handle<Object> new_length) = 0; |
112 MUST_USE_RESULT virtual MaybeObject* SetLength(JSArray* holder, | 115 MUST_USE_RESULT virtual MaybeObject* SetLength(JSArray* holder, |
113 Object* new_length) = 0; | 116 Object* new_length) = 0; |
114 | 117 |
115 // Modifies both the length and capacity of a JSArray, resizing the underlying | 118 // Modifies both the length and capacity of a JSArray, resizing the underlying |
116 // backing store as necessary. This method does NOT honor the semantics of | 119 // backing store as necessary. This method does NOT honor the semantics of |
117 // EcmaScript 5.1 15.4.5.2, arrays can be shrunk beyond non-deletable | 120 // EcmaScript 5.1 15.4.5.2, arrays can be shrunk beyond non-deletable |
118 // elements. This method should only be called for array expansion OR by | 121 // elements. This method should only be called for array expansion OR by |
119 // runtime JavaScript code that use InternalArrays and don't care about | 122 // runtime JavaScript code that use InternalArrays and don't care about |
120 // EcmaScript 5.1 semantics. | 123 // EcmaScript 5.1 semantics. |
121 MUST_USE_RESULT virtual MaybeObject* SetCapacityAndLength(JSArray* array, | 124 MUST_USE_RESULT virtual MaybeObject* SetCapacityAndLength(JSArray* array, |
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199 | 202 |
200 void CheckArrayAbuse(JSObject* obj, const char* op, uint32_t key, | 203 void CheckArrayAbuse(JSObject* obj, const char* op, uint32_t key, |
201 bool allow_appending = false); | 204 bool allow_appending = false); |
202 | 205 |
203 Handle<Object> ArrayConstructInitializeElements(Handle<JSArray> array, | 206 Handle<Object> ArrayConstructInitializeElements(Handle<JSArray> array, |
204 Arguments* args); | 207 Arguments* args); |
205 | 208 |
206 } } // namespace v8::internal | 209 } } // namespace v8::internal |
207 | 210 |
208 #endif // V8_ELEMENTS_H_ | 211 #endif // V8_ELEMENTS_H_ |
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